JPype is an effort to allow python programs full access to java class libraries. This is achieved not through re-implementing Python, as Jython/JPython has done, but rather through interfacing at the native level in both Virtual Machines.

OpenCyc is the open source version of the Cyc(r) technology, the world's largest and most complete general knowledge base and reasoning engine. A new release with even more content, better performance, and improved reliability will be up shortly.

SpamPal is a mail classification program that can help separate your spam from the mail you really want to read. SpamPal includes support for POP3, IMAP4 and SMTP accounts and can be extended by dozens of plugins and tools and is available in 6 languages

Record online streams using MPlayer, VLC or any other recorder of your choosing. Join, tag and post process as you please. Schedule recordings of your favorite internet radio shows and download full streams to your hard drive. Requires .NET 3.5SP1.

An implementation of RFC 2426 - VCard. This groupware library will provide java applications with a way to read and write VCards from and to the VCard file format. Project goals are to provide a flexible and easy to use library with excellent docs

The goal of Simple is to bring the power of simplicity to the world of server side Java. The primary focus of the project is to provide a truly embeddable Java based HTTP engine capable of handling enormous loads. Simple provides a truly asynchronous service model, request completion is driven using an internal, transparent, monitoring system.

A J2EE servlet filter which compresses data written to the response. It supports several algorithms (gzip, deflate, etc.) and emphasizes minimal memory usage and high throughput. Also provides detailed performance stats.
Feel free to fork pjl-comp-filter on Github: https://github.com/nbartels/pjl-comp-filter